Electronic structure and optical properties of trifluoromethyl derivatives of С$_{60}$ and С$_{70}$ fullerenes

The energy spectra of ten isomers of trifluoromethyl derivatives of fullerenes С$_{60}$(CF$_3$)$_{10}$ and С$_{70}$(CF$_3$)$_{10}$ are calculated within the framework of the Hubbard model. Based on the obtained energy spectra, the optical absorption spectra of these compounds are modeled. The calculated optical absorption spectra are compared with the experimental spectra.